Early age tensile strength of concrete

Smith, Benjamin (2004). Early age tensile strength of concrete B.Sc Thesis, School of Engineering, The University of Queensland.

       
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Author Smith, Benjamin
Thesis Title Early age tensile strength of concrete
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2004
Thesis type B.Sc Thesis
Supervisor Professor Peter Dux
Dr Peter Morris
Dr M.B. Nooru-Mohamed
Total pages 87
Language eng
Subjects 0905 Civil Engineering
Formatted abstract

When a tensile stress is applied to concrete that exceeds its tensile capacity then cracking can often occur. This is particularly true for early age concrete which is very vulnerable to cracking due to its low tensile strength. The cracks can be caused by thermal stress, restrained shrinkage and stress induced by movement. Currently knowledge of the properties of early age concrete is limited and further research in this area is required.

With a better understanding of early age concrete, industrial practices could be improved and cracking reduced as structures would not be loaded until the required strength capacity of the concrete is reached. This would also allow a better understanding of when saw-cuts could be made to minimise cracks.

The research undertaken in this Undergraduate Thesis investigates the early age tensile strength of concrete between four to eight hours after casting, under the guidance of Associate Professor P. Dux, Dr P. Morris and Dr M.B. Nooru-Mohamed. Concrete specimens of two slumps, 25mm and 80mm, were tested under varying temperatures and the trends analysed. The results that were achieved will hopefully help to better understand how concrete properties develop throughout the very early stages after casting.

Keyword Concrete -- Cracking
Additional Notes * Civil Engineering thesis Civl4580, November 2004

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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